1 files changed, 1192 insertions, 0 deletions
diff --git a/libview/ev-pixbuf-cache.c b/libview/ev-pixbuf-cache.c
new file mode 100644
index 00000000..367f70d7
--- /dev/null
+++ b/libview/ev-pixbuf-cache.c
@@ -0,0 +1,1192 @@
+#include <config.h>
+#include "ev-pixbuf-cache.h"
+#include "ev-job-scheduler.h"
+#include "ev-view-private.h"
+
+typedef struct _CacheJobInfo
+{
+ EvJob *job;
+ gboolean page_ready;
+
+ /* Region of the page that needs to be drawn */
+ cairo_region_t *region;
+
+ /* Data we get from rendering */
+ cairo_surface_t *surface;
+
+ /* Selection data. 
+ * Selection_points are the coordinates encapsulated in selection.
+ * target_points is the target selection size. */
+ EvRectangle selection_points;
+ EvRectangle target_points;
+ EvSelectionStyle selection_style;
+ gboolean points_set;
+ 
+ cairo_surface_t *selection;
+ cairo_region_t *selection_region;
+} CacheJobInfo;
+
+struct _EvPixbufCache
+{
+ GObject parent;
+
+ /* We keep a link to our containing view just for style information. */
+ GtkWidget *view;
+ EvDocument *document;
+ EvDocumentModel *model;
+ int start_page;
+ int end_page;
+ gboolean inverted_colors;
+
+ gsize max_size;
+
+ /* preload_cache_size is the number of pages prior to the current
+ * visible area that we cache. It's normally 1, but could be 2 in the
+ * case of twin pages.
+ */
+ int preload_cache_size;
+ guint job_list_len;
+
+ CacheJobInfo *prev_job;
+ CacheJobInfo *job_list;
+ CacheJobInfo *next_job;
+};
+
+struct _EvPixbufCacheClass
+{
+ GObjectClass parent_class;
+
+ void (* job_finished) (EvPixbufCache *pixbuf_cache);
+};
+
+
+enum
+{
+ JOB_FINISHED,
+ N_SIGNALS,
+};
+
+static guint signals[N_SIGNALS] = {0, };
+
+static void ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache);
+static void ev_pixbuf_cache_class_init (EvPixbufCacheClass *pixbuf_cache);
+static void ev_pixbuf_cache_finalize (GObject *object);
+static void ev_pixbuf_cache_dispose (GObject *object);
+static void job_finished_cb (EvJob *job,
+ EvPixbufCache *pixbuf_cache);
+static CacheJobInfo *find_job_cache (EvPixbufCache *pixbuf_cache,
+ int page);
+static gboolean new_selection_surface_needed(EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ gint page,
+ gfloat scale);
+
+
+/* These are used for iterating through the prev and next arrays */
+#define FIRST_VISIBLE_PREV(pixbuf_cache) \
+ (MAX (0, pixbuf_cache->preload_cache_size - pixbuf_cache->start_page))
+#define VISIBLE_NEXT_LEN(pixbuf_cache) \
+ (MIN(pixbuf_cache->preload_cache_size, ev_document_get_n_pages (pixbuf_cache->document) - (1 + pixbuf_cache->end_page)))
+#define PAGE_CACHE_LEN(pixbuf_cache) \
+ ((pixbuf_cache->end_page - pixbuf_cache->start_page) + 1)
+
+#define MAX_PRELOADED_PAGES 3
+
+G_DEFINE_TYPE (EvPixbufCache, ev_pixbuf_cache, G_TYPE_OBJECT)
+
+static void
+ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache)
+{
+ pixbuf_cache->start_page = -1;
+ pixbuf_cache->end_page = -1;
+}
+
+static void
+ev_pixbuf_cache_class_init (EvPixbufCacheClass *class)
+{
+ GObjectClass *object_class;
+
+ object_class = G_OBJECT_CLASS (class);
+
+ object_class->finalize = ev_pixbuf_cache_finalize;
+ object_class->dispose = ev_pixbuf_cache_dispose;
+
+ signals[JOB_FINISHED] =
+ g_signal_new ("job-finished",
+ G_OBJECT_CLASS_TYPE (object_class),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (EvPixbufCacheClass, job_finished),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE, 1,
+ G_TYPE_POINTER);
+}
+
+static void
+ev_pixbuf_cache_finalize (GObject *object)
+{
+ EvPixbufCache *pixbuf_cache;
+
+ pixbuf_cache = EV_PIXBUF_CACHE (object);
+
+ if (pixbuf_cache->job_list) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->job_list_len,
+ pixbuf_cache->job_list);
+ pixbuf_cache->job_list = NULL;
+ }
+ if (pixbuf_cache->prev_job) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->preload_cache_size,
+ pixbuf_cache->prev_job);
+ pixbuf_cache->prev_job = NULL;
+ }
+ if (pixbuf_cache->next_job) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->preload_cache_size,
+ pixbuf_cache->next_job);
+ pixbuf_cache->next_job = NULL;
+ }
+
+ g_object_unref (pixbuf_cache->model);
+
+ G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->finalize (object);
+}
+
+static void
+dispose_cache_job_info (CacheJobInfo *job_info,
+ gpointer data)
+{
+ if (job_info == NULL)
+ return;
+
+ if (job_info->job) {
+ g_signal_handlers_disconnect_by_func (job_info->job,
+ G_CALLBACK (job_finished_cb),
+ data);
+ ev_job_cancel (job_info->job);
+ g_object_unref (job_info->job);
+ job_info->job = NULL;
+ }
+ if (job_info->surface) {
+ cairo_surface_destroy (job_info->surface);
+ job_info->surface = NULL;
+ }
+ if (job_info->region) {
+ cairo_region_destroy (job_info->region);
+ job_info->region = NULL;
+ }
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+ if (job_info->selection_region) {
+ cairo_region_destroy (job_info->selection_region);
+ job_info->selection_region = NULL;
+ }
+
+ job_info->points_set = FALSE;
+}
+
+static void
+ev_pixbuf_cache_dispose (GObject *object)
+{
+ EvPixbufCache *pixbuf_cache;
+ int i;
+
+ pixbuf_cache = EV_PIXBUF_CACHE (object);
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+ dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+ }
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
+ }
+
+ G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->dispose (object);
+}
+
+
+EvPixbufCache *
+ev_pixbuf_cache_new (GtkWidget *view,
+ EvDocumentModel *model,
+ gsize max_size)
+{
+ EvPixbufCache *pixbuf_cache;
+
+ pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
+ /* This is a backlink, so we don't ref this */ 
+ pixbuf_cache->view = view;
+ pixbuf_cache->model = g_object_ref (model);
+ pixbuf_cache->document = ev_document_model_get_document (model);
+ pixbuf_cache->max_size = max_size;
+
+ return pixbuf_cache;
+}
+
+void
+ev_pixbuf_cache_set_max_size (EvPixbufCache *pixbuf_cache,
+ gsize max_size)
+{
+ if (pixbuf_cache->max_size == max_size)
+ return;
+
+ if (pixbuf_cache->max_size > max_size)
+ ev_pixbuf_cache_clear (pixbuf_cache);
+ pixbuf_cache->max_size = max_size;
+}
+
+static void
+copy_job_to_job_info (EvJobRender *job_render,
+ CacheJobInfo *job_info,
+ EvPixbufCache *pixbuf_cache)
+{
+ if (job_info->surface) {
+ cairo_surface_destroy (job_info->surface);
+ }
+ job_info->surface = cairo_surface_reference (job_render->surface);
+ if (pixbuf_cache->inverted_colors) {
+ ev_document_misc_invert_surface (job_info->surface);
+ }
+
+ job_info->points_set = FALSE;
+ if (job_render->include_selection) {
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+ if (job_info->selection_region) {
+ cairo_region_destroy (job_info->selection_region);
+ job_info->selection_region = NULL;
+ }
+
+ job_info->selection_points = job_render->selection_points;
+ job_info->selection_region = cairo_region_reference (job_render->selection_region);
+ job_info->selection = cairo_surface_reference (job_render->selection);
+ g_assert (job_info->selection_points.x1 >= 0);
+ job_info->points_set = TRUE;
+ }
+
+ if (job_info->job) {
+ g_signal_handlers_disconnect_by_func (job_info->job,
+ G_CALLBACK (job_finished_cb),
+ pixbuf_cache);
+ ev_job_cancel (job_info->job);
+ g_object_unref (job_info->job);
+ job_info->job = NULL;
+ }
+
+ job_info->page_ready = TRUE;
+}
+
+static void
+job_finished_cb (EvJob *job,
+ EvPixbufCache *pixbuf_cache)
+{
+ CacheJobInfo *job_info;
+ EvJobRender *job_render = EV_JOB_RENDER (job);
+
+ /* If the job is outside of our interest, we silently discard it */
+ if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
+ (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
+ g_object_unref (job);
+ return;
+ }
+
+ job_info = find_job_cache (pixbuf_cache, job_render->page);
+
+ copy_job_to_job_info (job_render, job_info, pixbuf_cache);
+ g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
+}
+
+/* This checks a job to see if the job would generate the right sized pixbuf
+ * given a scale. If it won't, it removes the job and clears it to NULL.
+ */
+static void
+check_job_size_and_unref (EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ gfloat scale)
+{
+ gint width, height;
+
+ g_assert (job_info);
+
+ if (job_info->job == NULL)
+ return;
+
+ _get_page_size_for_scale_and_rotation (job_info->job->document,
+ EV_JOB_RENDER (job_info->job)->page,
+ scale,
+ EV_JOB_RENDER (job_info->job)->rotation,
+ &width, &height);
+ if (width == EV_JOB_RENDER (job_info->job)->target_width &&
+ height == EV_JOB_RENDER (job_info->job)->target_height)
+ return;
+
+ g_signal_handlers_disconnect_by_func (job_info->job,
+ G_CALLBACK (job_finished_cb),
+ pixbuf_cache);
+ ev_job_cancel (job_info->job);
+ g_object_unref (job_info->job);
+ job_info->job = NULL;
+}
+
+/* Do all function that copies a job from an older cache to it's position in the
+ * new cache. It clears the old job if it doesn't have a place.
+ */
+static void
+move_one_job (CacheJobInfo *job_info,
+ EvPixbufCache *pixbuf_cache,
+ int page,
+ CacheJobInfo *new_job_list,
+ CacheJobInfo *new_prev_job,
+ CacheJobInfo *new_next_job,
+ int new_preload_cache_size,
+ int start_page,
+ int end_page,
+ gint priority)
+{
+ CacheJobInfo *target_page = NULL;
+ int page_offset;
+ gint new_priority;
+
+ if (page < (start_page - new_preload_cache_size) ||
+ page > (end_page + new_preload_cache_size)) {
+ dispose_cache_job_info (job_info, pixbuf_cache);
+ return;
+ }
+
+ /* find the target page to copy it over to. */
+ if (page < start_page) {
+ page_offset = (page - (start_page - new_preload_cache_size));
+
+ g_assert (page_offset >= 0 &&
+ page_offset < new_preload_cache_size);
+ target_page = new_prev_job + page_offset;
+ new_priority = EV_JOB_PRIORITY_LOW;
+ } else if (page > end_page) {
+ page_offset = (page - (end_page + 1));
+
+ g_assert (page_offset >= 0 &&
+ page_offset < new_preload_cache_size);
+ target_page = new_next_job + page_offset;
+ new_priority = EV_JOB_PRIORITY_LOW;
+ } else {
+ page_offset = page - start_page;
+ g_assert (page_offset >= 0 &&
+ page_offset <= ((end_page - start_page) + 1));
+ new_priority = EV_JOB_PRIORITY_URGENT;
+ target_page = new_job_list + page_offset;
+ }
+
+ *target_page = *job_info;
+ job_info->job = NULL;
+ job_info->region = NULL;
+ job_info->surface = NULL;
+
+ if (new_priority != priority && target_page->job) {
+ ev_job_scheduler_update_job (target_page->job, new_priority);
+ }
+}
+
+static gsize
+ev_pixbuf_cache_get_page_size (EvPixbufCache *pixbuf_cache,
+ gint page_index,
+ gdouble scale,
+ gint rotation)
+{
+ gint width, height;
+
+ _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
+ page_index, scale, rotation,
+ &width, &height);
+ return height * cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
+}
+
+static gint
+ev_pixbuf_cache_get_preload_size (EvPixbufCache *pixbuf_cache,
+ gint start_page,
+ gint end_page,
+ gdouble scale,
+ gint rotation)
+{
+ gsize range_size = 0;
+ gint new_preload_cache_size = 0;
+ gint i;
+ guint n_pages = ev_document_get_n_pages (pixbuf_cache->document);
+
+ /* Get the size of the current range */
+ for (i = start_page; i <= end_page; i++) {
+ range_size += ev_pixbuf_cache_get_page_size (pixbuf_cache, i, scale, rotation);
+ }
+
+ if (range_size >= pixbuf_cache->max_size)
+ return new_preload_cache_size;
+
+ i = 1;
+ while (((start_page - i > 0) || (end_page + i < n_pages)) &&
+ new_preload_cache_size < MAX_PRELOADED_PAGES) {
+ gsize page_size;
+ gboolean updated = FALSE;
+
+ if (end_page + i < n_pages) {
+ page_size = ev_pixbuf_cache_get_page_size (pixbuf_cache, end_page + i,
+ scale, rotation);
+ if (page_size + range_size <= pixbuf_cache->max_size) {
+ range_size += page_size;
+ new_preload_cache_size++;
+ updated = TRUE;
+ } else {
+ break;
+ }
+ }
+
+ if (start_page - i > 0) {
+ page_size = ev_pixbuf_cache_get_page_size (pixbuf_cache, start_page - i,
+ scale, rotation);
+ if (page_size + range_size <= pixbuf_cache->max_size) {
+ range_size += page_size;
+ if (!updated)
+ new_preload_cache_size++;
+ } else {
+ break;
+ }
+ }
+ i++;
+ }
+
+ return new_preload_cache_size;
+}
+
+static void
+ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
+ gint start_page,
+ gint end_page,
+ guint rotation,
+ gdouble scale)
+{
+ CacheJobInfo *new_job_list;
+ CacheJobInfo *new_prev_job = NULL;
+ CacheJobInfo *new_next_job = NULL;
+ gint new_preload_cache_size;
+ guint new_job_list_len;
+ int i, page;
+
+ new_preload_cache_size = ev_pixbuf_cache_get_preload_size (pixbuf_cache,
+ start_page,
+ end_page,
+ scale,
+ rotation);
+ if (pixbuf_cache->start_page == start_page &&
+ pixbuf_cache->end_page == end_page &&
+ pixbuf_cache->preload_cache_size == new_preload_cache_size)
+ return;
+
+ new_job_list_len = (end_page - start_page) + 1;
+ new_job_list = g_slice_alloc0 (sizeof (CacheJobInfo) * new_job_list_len);
+ if (new_preload_cache_size > 0) {
+ new_prev_job = g_slice_alloc0 (sizeof (CacheJobInfo) * new_preload_cache_size);
+ new_next_job = g_slice_alloc0 (sizeof (CacheJobInfo) * new_preload_cache_size);
+ }
+
+ /* We go through each job in the old cache and either clear it or move
+ * it to a new location. */
+
+ /* Start with the prev cache. */
+ page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page < 0) {
+ dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+ } else {
+ move_one_job (pixbuf_cache->prev_job + i,
+ pixbuf_cache, page,
+ new_job_list, new_prev_job, new_next_job,
+ new_preload_cache_size,
+ start_page, end_page, EV_JOB_PRIORITY_LOW);
+ }
+ page ++;
+ }
+
+ page = pixbuf_cache->start_page;
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache) && page >= 0; i++) {
+ move_one_job (pixbuf_cache->job_list + i,
+ pixbuf_cache, page,
+ new_job_list, new_prev_job, new_next_job,
+ new_preload_cache_size,
+ start_page, end_page, EV_JOB_PRIORITY_URGENT);
+ page ++;
+ }
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page >= ev_document_get_n_pages (pixbuf_cache->document)) {
+ dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+ } else {
+ move_one_job (pixbuf_cache->next_job + i,
+ pixbuf_cache, page,
+ new_job_list, new_prev_job, new_next_job,
+ new_preload_cache_size,
+ start_page, end_page, EV_JOB_PRIORITY_LOW);
+ }
+ page ++;
+ }
+
+ if (pixbuf_cache->job_list) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->job_list_len,
+ pixbuf_cache->job_list);
+ }
+ if (pixbuf_cache->prev_job) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->preload_cache_size,
+ pixbuf_cache->prev_job);
+ }
+ if (pixbuf_cache->next_job) {
+ g_slice_free1 (sizeof (CacheJobInfo) * pixbuf_cache->preload_cache_size,
+ pixbuf_cache->next_job);
+ }
+
+ pixbuf_cache->preload_cache_size = new_preload_cache_size;
+ pixbuf_cache->job_list_len = new_job_list_len;
+
+ pixbuf_cache->job_list = new_job_list;
+ pixbuf_cache->prev_job = new_prev_job;
+ pixbuf_cache->next_job = new_next_job;
+
+ pixbuf_cache->start_page = start_page;
+ pixbuf_cache->end_page = end_page;
+}
+
+static CacheJobInfo *
+find_job_cache (EvPixbufCache *pixbuf_cache,
+ int page)
+{
+ int page_offset;
+
+ if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
+ page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
+ return NULL;
+
+ if (page < pixbuf_cache->start_page) {
+ page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
+
+ g_assert (page_offset >= 0 &&
+ page_offset < pixbuf_cache->preload_cache_size);
+ return pixbuf_cache->prev_job + page_offset;
+ }
+
+ if (page > pixbuf_cache->end_page) {
+ page_offset = (page - (pixbuf_cache->end_page + 1));
+
+ g_assert (page_offset >= 0 &&
+ page_offset < pixbuf_cache->preload_cache_size);
+ return pixbuf_cache->next_job + page_offset;
+ }
+
+ page_offset = page - pixbuf_cache->start_page;
+ g_assert (page_offset >= 0 &&
+ page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
+ return pixbuf_cache->job_list + page_offset;
+}
+
+static void
+ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
+ gfloat scale)
+{
+ int i;
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, scale);
+ }
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, scale);
+ check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, scale);
+ }
+}
+
+static void
+get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
+{
+ GtkStyle *style = gtk_widget_get_style (widget);
+
+ if (gtk_widget_has_focus (widget)) {
+ *text = &style->text [GTK_STATE_SELECTED];
+ *base = &style->base [GTK_STATE_SELECTED];
+ } else {
+ *text = &style->text [GTK_STATE_ACTIVE];
+ *base = &style->base [GTK_STATE_ACTIVE];
+ }
+}
+
+static void
+add_job (EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ cairo_region_t *region,
+ gint width,
+ gint height,
+ gint page,
+ gint rotation,
+ gfloat scale,
+ EvJobPriority priority)
+{
+ job_info->page_ready = FALSE;
+
+ if (job_info->region)
+ cairo_region_destroy (job_info->region);
+ job_info->region = region ? cairo_region_reference (region) : NULL;
+
+ job_info->job = ev_job_render_new (pixbuf_cache->document,
+ page, rotation, scale,
+ width, height);
+
+ if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
+ GdkColor *text, *base;
+
+ gtk_widget_ensure_style (pixbuf_cache->view);
+ get_selection_colors (pixbuf_cache->view, &text, &base);
+ ev_job_render_set_selection_info (EV_JOB_RENDER (job_info->job), 
+ &(job_info->target_points),
+ job_info->selection_style,
+ text, base);
+ }
+
+ g_signal_connect (job_info->job, "finished",
+ G_CALLBACK (job_finished_cb),
+ pixbuf_cache);
+ ev_job_scheduler_push_job (job_info->job, priority);
+}
+
+static void
+add_job_if_needed (EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ gint page,
+ gint rotation,
+ gfloat scale,
+ EvJobPriority priority)
+{
+ gint width, height;
+
+ if (job_info->job)
+ return;
+
+ _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
+ page, scale, rotation,
+ &width, &height);
+
+ if (job_info->surface &&
+ cairo_image_surface_get_width (job_info->surface) == width &&
+ cairo_image_surface_get_height (job_info->surface) == height)
+ return;
+
+ /* Free old surfaces for non visible pages */
+ if (priority == EV_JOB_PRIORITY_LOW) {
+ if (job_info->surface) {
+ cairo_surface_destroy (job_info->surface);
+ job_info->surface = NULL;
+ }
+
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+ }
+
+ add_job (pixbuf_cache, job_info, NULL,
+ width, height, page, rotation, scale,
+ priority);
+}
+
+static void
+ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
+ gint rotation,
+ gfloat scale)
+{
+ CacheJobInfo *job_info;
+ int page;
+ int i;
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ job_info = (pixbuf_cache->job_list + i);
+ page = pixbuf_cache->start_page + i;
+
+ add_job_if_needed (pixbuf_cache, job_info,
+ page, rotation, scale,
+ EV_JOB_PRIORITY_URGENT);
+ }
+
+ for (i = FIRST_VISIBLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
+ job_info = (pixbuf_cache->prev_job + i);
+ page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
+
+ add_job_if_needed (pixbuf_cache, job_info,
+ page, rotation, scale,
+ EV_JOB_PRIORITY_LOW);
+ }
+
+ for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache); i++) {
+ job_info = (pixbuf_cache->next_job + i);
+ page = pixbuf_cache->end_page + 1 + i;
+
+ add_job_if_needed (pixbuf_cache, job_info,
+ page, rotation, scale,
+ EV_JOB_PRIORITY_LOW);
+ }
+
+}
+
+void
+ev_pixbuf_cache_set_page_range (EvPixbufCache *pixbuf_cache,
+ gint start_page,
+ gint end_page,
+ GList *selection_list)
+{
+ gdouble scale = ev_document_model_get_scale (pixbuf_cache->model);
+ gint rotation = ev_document_model_get_rotation (pixbuf_cache->model);
+
+ g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
+
+ g_return_if_fail (start_page >= 0 && start_page < ev_document_get_n_pages (pixbuf_cache->document));
+ g_return_if_fail (end_page >= 0 && end_page < ev_document_get_n_pages (pixbuf_cache->document));
+ g_return_if_fail (end_page >= start_page);
+
+ /* First, resize the page_range as needed. We cull old pages
+ * mercilessly. */
+ ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page, rotation, scale);
+
+ /* Then, we update the current jobs to see if any of them are the wrong
+ * size, we remove them if we need to. */
+ ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
+
+ /* Next, we update the target selection for our pages */
+ ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
+
+ /* Finally, we add the new jobs for all the sizes that don't have a
+ * pixbuf */
+ ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
+}
+
+void
+ev_pixbuf_cache_set_inverted_colors (EvPixbufCache *pixbuf_cache,
+ gboolean inverted_colors)
+{
+ gint i;
+
+ if (pixbuf_cache->inverted_colors == inverted_colors)
+ return;
+
+ pixbuf_cache->inverted_colors = inverted_colors;
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ CacheJobInfo *job_info;
+
+ job_info = pixbuf_cache->prev_job + i;
+ if (job_info && job_info->surface)
+ ev_document_misc_invert_surface (job_info->surface);
+
+ job_info = pixbuf_cache->next_job + i;
+ if (job_info && job_info->surface)
+ ev_document_misc_invert_surface (job_info->surface);
+ }
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ CacheJobInfo *job_info;
+
+ job_info = pixbuf_cache->job_list + i;
+ if (job_info && job_info->surface)
+ ev_document_misc_invert_surface (job_info->surface);
+ }
+}
+
+cairo_surface_t *
+ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
+ gint page)
+{
+ CacheJobInfo *job_info;
+
+ job_info = find_job_cache (pixbuf_cache, page);
+ if (job_info == NULL)
+ return NULL;
+
+ if (job_info->page_ready)
+ return job_info->surface;
+
+ /* We don't need to wait for the idle to handle the callback */
+ if (job_info->job &&
+ EV_JOB_RENDER (job_info->job)->page_ready) {
+ copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
+ g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
+ }
+
+ return job_info->surface;
+}
+
+static gboolean
+new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ gint page,
+ gfloat scale)
+{
+ if (job_info->selection) {
+ gint width, height;
+ gint selection_width, selection_height;
+
+ _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
+ page, scale, 0,
+ &width, &height);
+
+ selection_width = cairo_image_surface_get_width (job_info->selection);
+ selection_height = cairo_image_surface_get_height (job_info->selection);
+ 
+ if (width != selection_width || height != selection_height)
+ return TRUE;
+ } else {
+ if (job_info->points_set)
+ return TRUE;
+ }
+ 
+ return FALSE;
+}
+
+static void
+clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
+ CacheJobInfo *job_info,
+ gint page,
+ gfloat scale)
+{
+ if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
+ if (job_info->selection)
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ job_info->selection_points.x1 = -1;
+ }
+}
+
+/* Clears the cache of jobs and pixbufs.
+ */
+void
+ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
+{
+ int i;
+
+ if (!pixbuf_cache->job_list)
+ return;
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+ dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+ }
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
+ }
+}
+
+
+void
+ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
+{
+ gint i;
+
+ if (!pixbuf_cache->job_list)
+ return;
+
+ /* FIXME: doesn't update running jobs. */
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ CacheJobInfo *job_info;
+
+ job_info = pixbuf_cache->prev_job + i;
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+
+ job_info = pixbuf_cache->next_job + i;
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+ }
+
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ CacheJobInfo *job_info;
+
+ job_info = pixbuf_cache->job_list + i;
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+ }
+}
+
+cairo_surface_t *
+ev_pixbuf_cache_get_selection_surface (EvPixbufCache *pixbuf_cache,
+ gint page,
+ gfloat scale,
+ cairo_region_t **region)
+{
+ CacheJobInfo *job_info;
+
+ /* the document does not implement the selection interface */
+ if (!EV_IS_SELECTION (pixbuf_cache->document))
+ return NULL;
+
+ job_info = find_job_cache (pixbuf_cache, page);
+ if (job_info == NULL)
+ return NULL;
+
+ /* No selection on this page */
+ if (!job_info->points_set)
+ return NULL;
+
+ /* If we have a running job, we just return what we have under the
+ * assumption that it'll be updated later and we can scale it as need
+ * be */
+ if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
+ return job_info->selection;
+
+ /* Now, lets see if we need to resize the image. If we do, we clear the
+ * old one. */
+ clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
+
+ /* Finally, we see if the two scales are the same, and get a new pixbuf
+ * if needed. We do this synchronously for now. At some point, we
+ * _should_ be able to get rid of the doc_mutex, so the synchronicity
+ * doesn't kill us. Rendering a few glyphs should really be fast.
+ */
+ if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
+ EvRectangle *old_points;
+ GdkColor *text, *base;
+ EvRenderContext *rc;
+ EvPage *ev_page;
+
+ /* we need to get a new selection pixbuf */
+ ev_document_doc_mutex_lock ();
+ if (job_info->selection_points.x1 < 0) {
+ g_assert (job_info->selection == NULL);
+ old_points = NULL;
+ } else {
+ g_assert (job_info->selection != NULL);
+ old_points = &(job_info->selection_points);
+ }
+
+ ev_page = ev_document_get_page (pixbuf_cache->document, page);
+ rc = ev_render_context_new (ev_page, 0, scale);
+ g_object_unref (ev_page);
+
+ if (job_info->selection_region)
+ cairo_region_destroy (job_info->selection_region);
+ job_info->selection_region =
+ ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
+ rc, job_info->selection_style,
+ &(job_info->target_points));
+
+ gtk_widget_ensure_style (pixbuf_cache->view);
+
+ get_selection_colors (pixbuf_cache->view, &text, &base);
+
+ ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
+ rc, &(job_info->selection),
+ &(job_info->target_points),
+ old_points,
+ job_info->selection_style,
+ text, base);
+ job_info->selection_points = job_info->target_points;
+ g_object_unref (rc);
+ ev_document_doc_mutex_unlock ();
+ }
+ if (region)
+ *region = job_info->selection_region;
+ return job_info->selection;
+}
+
+static void
+update_job_selection (CacheJobInfo *job_info,
+ EvViewSelection *selection)
+{
+ job_info->points_set = TRUE; 
+ job_info->target_points = selection->rect;
+ job_info->selection_style = selection->style;
+}
+
+static void
+clear_job_selection (CacheJobInfo *job_info)
+{
+ job_info->points_set = FALSE;
+ job_info->selection_points.x1 = -1;
+
+ if (job_info->selection) {
+ cairo_surface_destroy (job_info->selection);
+ job_info->selection = NULL;
+ }
+}
+
+/* This function will reset the selection on pages that no longer have them, and
+ * will update the target_selection on those that need it. It will _not_ free
+ * the previous selection_list -- that's up to caller to do.
+ */
+void
+ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
+ GList *selection_list)
+{
+ EvViewSelection *selection;
+ GList *list = selection_list;
+ int page;
+ int i;
+
+ g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
+
+ if (!EV_IS_SELECTION (pixbuf_cache->document))
+ return;
+
+ /* We check each area to see what needs updating, and what needs freeing; */
+ page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page < 0) {
+ page ++;
+ continue;
+ }
+
+ selection = NULL;
+ while (list) {
+ if (((EvViewSelection *)list->data)->page == page) {
+ selection = list->data;
+ break;
+ } else if (((EvViewSelection *)list->data)->page > page) 
+ break;
+ list = list->next;
+ }
+
+ if (selection)
+ update_job_selection (pixbuf_cache->prev_job + i, selection);
+ else
+ clear_job_selection (pixbuf_cache->prev_job + i);
+ page ++;
+ }
+
+ page = pixbuf_cache->start_page;
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ selection = NULL;
+ while (list) {
+ if (((EvViewSelection *)list->data)->page == page) {
+ selection = list->data;
+ break;
+ } else if (((EvViewSelection *)list->data)->page > page) 
+ break;
+ list = list->next;
+ }
+
+ if (selection)
+ update_job_selection (pixbuf_cache->job_list + i, selection);
+ else
+ clear_job_selection (pixbuf_cache->job_list + i);
+ page ++;
+ }
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page >= ev_document_get_n_pages (pixbuf_cache->document))
+ break;
+
+ selection = NULL;
+ while (list) {
+ if (((EvViewSelection *)list->data)->page == page) {
+ selection = list->data;
+ break;
+ } else if (((EvViewSelection *)list->data)->page > page) 
+ break;
+ list = list->next;
+ }
+
+ if (selection)
+ update_job_selection (pixbuf_cache->next_job + i, selection);
+ else
+ clear_job_selection (pixbuf_cache->next_job + i);
+ page ++;
+ }
+}
+
+
+/* Returns what the pixbuf cache thinks is */
+
+GList *
+ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
+{
+ EvViewSelection *selection;
+ GList *retval = NULL;
+ int page;
+ int i;
+
+ g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
+
+ /* We check each area to see what needs updating, and what needs freeing; */
+ page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page < 0) {
+ page ++;
+ continue;
+ }
+
+ if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
+ selection = g_new0 (EvViewSelection, 1);
+ selection->page = page;
+ selection->rect = pixbuf_cache->prev_job[i].selection_points;
+ if (pixbuf_cache->prev_job[i].selection_region)
+ selection->covered_region = cairo_region_reference (pixbuf_cache->prev_job[i].selection_region);
+ retval = g_list_append (retval, selection);
+ }
+ 
+ page ++;
+ }
+
+ page = pixbuf_cache->start_page;
+ for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+ if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
+ selection = g_new0 (EvViewSelection, 1);
+ selection->page = page;
+ selection->rect = pixbuf_cache->job_list[i].selection_points;
+ if (pixbuf_cache->job_list[i].selection_region)
+ selection->covered_region = cairo_region_reference (pixbuf_cache->job_list[i].selection_region);
+ retval = g_list_append (retval, selection);
+ }
+ 
+ page ++;
+ }
+
+ for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+ if (page >= ev_document_get_n_pages (pixbuf_cache->document))
+ break;
+
+ if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
+ selection = g_new0 (EvViewSelection, 1);
+ selection->page = page;
+ selection->rect = pixbuf_cache->next_job[i].selection_points;
+ if (pixbuf_cache->next_job[i].selection_region)
+ selection->covered_region = cairo_region_reference (pixbuf_cache->next_job[i].selection_region);
+ retval = g_list_append (retval, selection);
+ }
+ 
+ page ++;
+ }
+
+ return retval;
+}
+
+void
+ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
+ cairo_region_t *region,
+ gint page,
+ gint rotation,
+ gdouble scale)
+{
+ CacheJobInfo *job_info;
+ gint width, height;
+
+ job_info = find_job_cache (pixbuf_cache, page);
+ if (job_info == NULL)
+ return;
+
+ _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
+ page, scale, rotation,
+ &width, &height);
+ add_job (pixbuf_cache, job_info, region,
+ width, height, page, rotation, scale,
+ EV_JOB_PRIORITY_URGENT);
+}
+
+